SDLT on Transfer Between Spouses 2026
No specific spousal exemption for SDLT (unlike CGT and IHT). Unencumbered transfers between spouses for no consideration: nil SDLT. Transfers with assumed mortgage: SDLT on the assumed mortgage share. Spouses count as one unit for the 5% surcharge.
No spousal exemption from SDLT
Unlike Capital Gains Tax (which has the section 58 TCGA 1992 inter-spouse no-gain-no-loss treatment) and Inheritance Tax (which has the unlimited spouse exemption under section 18 IHTA 1984), SDLT has no specific exemption for transfers between spouses or civil partners during marriage. The only SDLT exemption tied to marital status is the divorce / dissolution exemption in paragraph 3 of Schedule 3 FA 2003, which applies only on court-ordered transfers in matrimonial or civil partnership proceedings.
For SDLT purposes, a transfer between spouses during an ongoing marriage is treated like any other property transfer between connected persons: nil where there is no chargeable consideration, taxable where the receiving spouse assumes a mortgage or pays cash. The absence of a spousal SDLT exemption is a frequent source of unexpected tax charges in family financial restructuring.
The general SDLT rules in section 50 FA 2003 apply: SDLT is calculated on the chargeable consideration, with the standard residential or non-residential bands depending on the property type. For inter-spouse transfers the chargeable consideration is normally either zero (pure gift between spouses) or the value of any assumed mortgage.
The common scenarios and their SDLT
| Scenario | Property value | Mortgage | SDLT on transfer |
|---|---|---|---|
| Spouse A transfers 50% interest to Spouse B, mortgage-free property, no consideration | £400,000 | £0 | £0 |
| Same transfer, joining spouse assumes 50% of £200k mortgage | £400,000 | £200,000 | £0 (£100k below threshold) |
| Same as above but joining spouse owns a separate flat worth £200k+ | £400,000 | £200,000 | £5,000 (5% surcharge on £100k) |
| Spouse A transfers whole property to Spouse B, B assumes whole £300k mortgage | £600,000 | £300,000 (full) | £5,000 standard |
| Same as above with surcharge (spouses own other dwellings) | £600,000 | £300,000 (full) | £20,000 (5% on every band) |
The £125,000 nil-rate threshold gives small-share, low-mortgage transfers a free pass. Above the threshold, SDLT applies on the assumed-mortgage portion at standard or surcharge rates.
Spouses as a single unit for surcharge purposes
Paragraph 9 of Schedule 4ZA FA 2003 treats spouses and civil partners as a single unit for the additional-dwellings surcharge test. If either spouse owns another dwelling worth £40,000 or more at the end of the day of a chargeable transaction, the 5% surcharge applies to the transaction regardless of which spouse is on the title. This rule prevents structuring around the surcharge by transferring between spouses.
Practical consequence: if Spouse A wants to buy a second home in their sole name to keep it off Spouse B's tax position, the additional-dwellings surcharge still applies because Spouse B already owns the matrimonial home (the spouses are a single unit). The only way to escape the surcharge under the spouses-as-unit rule is if both spouses live separately and the second purchase is a genuine replacement of one spouse's separate main residence, which is rare in practice and aggressively scrutinised by HMRC.
The rule applies even where the spouses are separated but not divorced (no decree absolute issued). Only formal dissolution removes the spouses-as-unit treatment. This is one of the reasons that interim financial structuring during a separation requires careful tax advice.
Why couples add spouses to the title
Several common scenarios drive inter-spouse property transfers during marriage. CGT planning: transferring a buy-to-let property partly into the lower-earning spouse's name to use both spouses' CGT annual exemptions on eventual sale. Income tax planning: transferring rental property into the lower-earning spouse's name to use both income tax bands on the rental profit. Mortgage approval: adding a higher-earning spouse to the title and mortgage to satisfy lender affordability tests on a remortgage. Estate planning: transferring assets to use both spouses' nil-rate bands for IHT.
Each of these structuring moves can trigger SDLT under the mortgage-assumption rule if the joining spouse assumes a share of an existing mortgage. The CGT and income tax savings often justify the SDLT cost, but the analysis must be done explicitly. A buy-to-let transfer where the joining spouse assumes 50% of a £300,000 mortgage costs £7,500 in SDLT (5% on £150,000 surcharge-inclusive, because the property is an additional dwelling) - a meaningful number against the typical 3-5 year CGT and income tax savings.
Some structures avoid SDLT altogether: a beneficial-interest transfer via declaration of trust without changing legal title and without re-mortgaging may have no chargeable consideration and no SDLT, while still achieving the CGT and income tax benefits. See declaration of trust.
Civil partners and same-sex marriages
Civil partners under the Civil Partnership Act 2004 and same-sex married couples are treated identically to opposite-sex married couples for all SDLT purposes, including the spouses-as-unit surcharge rule and the divorce / dissolution exemption. The rules apply from the date of formal registration of the marriage or civil partnership.
Unmarried cohabiting couples (regardless of duration of cohabitation or shared children) are not treated as a single unit for the surcharge. Each partner's property holdings are assessed independently for the surcharge test. This produces different SDLT results from married couples in many scenarios, generally to the benefit of cohabitees on inter-partner transfers and to the disadvantage of cohabitees on subsequent purchases.
Documentation and filing
An inter-spouse transfer of property is documented by a Land Registry Form TR1 (transfer) or TP1 (transfer of part), with the appropriate certificate-of-value box completed. Where the chargeable consideration is below the £40,000 notification threshold, no SDLT return is required. Above £40,000 a return must be filed within 14 days of completion, even if no SDLT is due.
The CGT inter-spouse no-gain-no-loss treatment under section 58 TCGA 1992 applies to transfers between spouses who are living together. For separated spouses the treatment is limited to the tax year of permanent separation, with normal market-value CGT applying thereafter. The income tax treatment for any rental income from the property follows the beneficial ownership shares, so updating the Land Registry title alone does not change the income tax position; a separate Form 17 declaration is needed for HMRC.
Frequently Asked Questions
Do spouses pay SDLT when transferring between themselves?
Only if there is chargeable consideration. No specific spousal SDLT exemption outside divorce.
Adding a spouse to the title: any SDLT?
Nil if no consideration. SDLT on the assumed-mortgage share if the joining spouse takes on a portion of the mortgage above the £125k threshold.
Will the additional-dwellings surcharge apply?
Yes if there is chargeable consideration AND either spouse owns another dwelling worth £40k+. Spouses are a single unit under paragraph 9 of Schedule 4ZA FA 2003.
Re-mortgaging the matrimonial home in joint names: any SDLT?
Pure re-mortgaging (same title): no SDLT. Adding a spouse to the title at the same time may attract SDLT.
Does putting the home into a declaration of trust attract SDLT?
Usually no if no consideration moves. See declaration of trust.
Are civil partners covered identically to spouses?
Yes, since the Civil Partnership Act 2004. Same-sex married couples since 13 March 2014.
Related guides
Not tax advice. Inter-spouse property transfers interact with SDLT, CGT, income tax, and IHT. Always engage a chartered tax adviser before re-titling property between spouses, particularly for buy-to-let restructuring or mortgage-related changes.